OQL Quick Reference Card

The following table presents all the OQL statements, expression types and the operators. For the operators common to C++ and OQL, the precedence and associativity is the same.

Quick Reference Card
Statements
expression statement	expr ;
selection statement	if ( cond_expr ) statement [else statement]
jump statements	break [expr] ;
	return [expr] ;
iteration statements	while ( cond_expr ) statement
	do statement while ( cond_expr )
	for ( [expr] ; [cond_expr] ; [expr] ) statement
	for ( var in expr ) statement
compound statement	{ statement }
function definition statement	function identifier ([arglist]) compound_statement
empty statement	;
Arithmetic Expressions
add	+	expr + expr
substract	-	expr - expr
multiply	*	expr * expr
divide	/	expr / expr
shift left	«	expr « expr
shift right	»	expr » expr
modular	%	expr % expr
bitwise and	&	expr & expr
bitwise inclusive or	|	expr | expr
bitwise xor	^	expr ^ expr
complement	~	~ expr
Assignment Expressions
simple assignment	:=	lvalue := expr
add and assign	+=	lvalue += expr
substract and assign	-=	lvalue -= expr
multiply and assign	*=	lvalue *= expr
divide and assign	/=	lvalue /= expr
shift left and assign	«	lvalue «= expr
shift right and assign	»	lvalue »= expr
inclusive OR and assign	|=	lvalue |= expr
exclusive OR and assign	&	lvalue &= expr
modulo and assign	%	lvalue %= expr
exclusive OR and assign	^	lvalue ^= expr
Auto Increment & Decrement Expressions
post increment	++	lvalue++
post decrement	-	lvalue-
pre increment	++	++lvalue
pre increment	-	-lvalue
Logical Expressions
logical and	&&	expr && expr
logical and	and	expr and expr
logical or	||	expr || expr
logical or	or	expr or expr
Comparison Expressions
not	!	! expr
not	not	not expr
equal	=	expr = expr
equal	==	expr == expr
not equal	!=	expr != expr
less than	<	expr < expr
less	<=	expr <= expr
greater	>	expr > expr
greater than	>=	expr >= expr
match regular expression	~	expr ~ expr
match regular expression case insensitive	~~	expr ~~ expr
not match regular expression	!~	expr !~ expr
not match regular expression case insensitive	!~~	expr !~~ expr
match regular expression	like	expr like expr
Conditionnal Expressions
conditionnal expression	? :	expr ? expr : expr
Expression Lists
comma sequencing	,	expr , expr
Array Expressions
subscripting	[]	expr [expr ]
interval subscriptiong	[:]	expr [expr :expr ]
Path Expressions
member selection	.	expr . expr
member selection	->	expr -> expr
Function Call
function call	()	expr (expr_list)
Method Invocation
member selection	()	expr ->expr (arglist)
Eval/Unval Operators
eval	eval	eval expr
no eval	unval	unval expr
Identifier Expressions
scope	::	:: identifier
is set	isset	isset identifier
unset	unset	unset identifier
reference of	&	& identifier
	refof	refof identifier
value of	*	* identifier
value of	valof	valof identifier
scope of	scopeof	scopeof identifier
push onto symbol table	push	push identifier
push onto symbol table and assign	push	push expr
pop from symbol table	pop	pop identifier
Set Expressions
union	union	expr union expr
intersection	intersect	expr intersect expr
except	except	expr except expr
include	<	expr < expr
include or equal	<=	expr <= expr
contain	>	expr > expr
contain or equal	>=	expr >= expr
Object Creation
new	new	[new] new_construct
new	new	new< opt_expr > new_construct
Object Deletion
delete	delete	delete expr
Collection Expressions
contents	contents	contents expr
is in	in	expr in expr
add to collection	add to	add expr to expr
suppress from collection	suppress from	suppress expr from expr
set element in or get element from an indexed collection	[]	expr [ expr ]
append to an indexed collection	append/to	append expr to expr
empty collection	empty	empty expr
exists in collection	in	exists identifier in expr : expr
for all in collection	for all	for all identifier in expr : expr
for some in collection	for	for < expr , expr > in expr : expr
Exception Expressions
throw exception	throw	throw expr
Function Definition
define function	define as	define identifier [arglist as expr
Conversion
string conversion	string	string( expr )
integer conversion	int	int( expr )
character conversion	char	char( expr )
float conversion	float	float( expr )
identifier conversion	ident	ident( expr )
oid conversion	oid	oid( expr )
Query Expressions
database query	select	select expr [from {expr [as] identifier} [where expr]] [order by {expr}]
		select expr [from {identifier in expr} [where expr]] [order by {expr}]
Type Information Expressions
class of	classof	classof expr
typeof of	typeof	typeof expr
Miscellenaous Expressions
structure of	structof	structof expr
body of	bodyof	bodyof expr
length pf	[!]	expr [!]
import package	import	import expr